1.TCP服务端案例

from socket import *
from select import select
import sys 
import time
# 获取当前时间
def get_time_stamp():
    ct = time.time()
    local_time = time.localtime(ct)
    data_head = time.strftime("%Y-%m-%d %H:%M:%S", local_time)
    data_secs = (ct - (ct)) * 1000
    time_stamp = "%s.%03d" % (data_head, data_secs)
    return time_stamp
# 创建套接字作为关注的IO 
s=socket()
s.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)
s.bind(('127.0.0.1',9988))
s.listen(5)
#添加关注列表
rlist=[s,sys.stdin]
wlist=[]
xlist=[]
# 监控关注的ＩＯ
f=open('lomy.txt','a')
while True:
    rs,ws,xs=select(rlist,wlist,xlist)
    # 遍历确定就绪的ＩＯ
    for r in rs:
        if r is s: #就绪，有客户端请求连接
            c,addr=s.accept()
            print('connect from ',addr)
            #将客户端套接字加入关注
            rlist.append(c)
        elif r is sys.stdin:
            data=sys.stdin.readline()
            data=get_time_stamp()+'>>>>>'+data+'\n'
            f.write(data)
            f.flush()
        else:
            data=r.recv(1024)
            if not data:
                rlist.remove(r)
                r.close()
                continue
            data=get_time_stamp()+'>>'+data.decode()+'\n'
            f.write(data)
            f.flush()
            # print('receive:',data.decode())
            # r.send(b'ok thanks')
            #当r放入wlist表示希望主动操作r这个IO
            wlist.append(r)
    for w in ws:
        w.send(b'ok,Thanks')
        wlist.remove(w)
    for x in xs:
        pass

2.客户端代码：

from socket import *
# 创建套接字
sk=socket()
# 发起连接
server_addr=('127.0.0.1',9988)
sk.connect(server_addr)
# 收发消息
while True:
    data=input('>>')
    if not data:
        break
    sk.send(data.encode())
    data=sk.recv(1024)
    print('from server:',data.decode())
sk.close()